Aguilar-Reyes Primary Battle in California Is Test for Democrats

Party's Effort to Pick Up a House Seat Is Complicated by Split

A split between Democratic leaders and a prominent women's political group is complicating the party's effort to secure a House seat that is one of its best pickup opportunities in this year's midterm elections.

At issue is an open California seat that was the scene of the Democrats' most bitter loss in 2012: A liberal-leaning district was won by a Republican after Democratic candidates split their party's vote, sending no Democrat...